package com.jyh.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.net.URI;

/**
 * 全局过滤器 - 耗时统计
 * @author jiangyiheng
 */
@Slf4j
@Component
public class RtGlobalFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String uri = exchange.getRequest().getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求开始【{}】开始时间：{}", uri, start);
        // ======================以上是前置逻辑======================
        Mono<Void> filter = chain.filter(exchange)
                .doFinally((result)->{
                    // ======================以下是后置逻辑======================
                    long end = System.currentTimeMillis();
                    log.info("请求结束【{}】结束时间：{} ,耗时：{}ms", uri, end, end - start);
                }); // 放行

        return filter;
    }

    // 优先级
    @Override
    public int getOrder() {
        return 0;
    }
}